2021 CADILLAC XT4 service

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
INSTRUMENTS AND CONTROLS 107
The vehicle may not pass
inspection if:
.The light is on when the engine is
running.
.The light does not come on when
the ignition is in Service Mode.
.Critical emission control systems
have not been completely
diagnosed. If this happens, the
vehicle would not be ready for
inspection and might require
several days of routine driving
before the system is ready for
inspection. This can happen if the
12-volt battery has recently been
replaced or run down, or if the
vehicle has been recently serviced.
See your dealer if the vehicle will not
pass or cannot be made ready for
the test.
Brake System Warning
Light
MetricEnglish
This light should come on briefly
when the vehicle is turned on. If it
does not come on then, have it fixed
so it will be ready to warn you if there
is a problem.
If the light comes on and stays on at
start up, there is a brake problem.
Have the brake system inspected
right away.
If the light comes on while driving,
pull off the road and stop carefully.
The brake system has electric brake
boost. Vehicle speed may be limited
when the brake system warning light
comes on. The brake pedal might be
harder to push, or the brake pedal
may go closer to the floor. It could take longer to stop. If the light is still
on, have the vehicle towed for service.
See
Towing the Vehicle 0345.
{Warning
The brake system might not be
working properly if the brake
system warning light is on. Driving
with the brake system warning light
on can lead to a crash. If the light is
still on after the vehicle has been
pulled off the road and carefully
stopped, have the vehicle towed for
service.
Electric Parking Brake
Light
MetricEnglish
This light comes on when the parking
brake is applied. If the light continues
flashing after the parking brake is
released, or while driving, there is a

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
108 INSTRUMENTS AND CONTROLS
problem with the Electric Parking
Brake system. A message may also
display in the Driver Information
Center (DIC).
If the light does not come on,
or remains flashing, see your dealer.
Service Electric Parking
Brake Light
On some vehicles the service electric
parking brake light should come on
briefly when the vehicle is started.
If it does not come on, have it fixed so
it will be ready to warn if there is a
problem. For vehicles with the
reconfigurable cluster, this light may
not come on when the vehicle is
started.If this light stays on, the vehicle
should be taken to a dealer as soon as
possible. See
Electric Parking Brake
0 233. A message may also display in
the Driver Information Center (DIC).
Antilock Brake System
(ABS) Warning Light
This warning light should come on
briefly when the vehicle is turned on.
If the light does not come on, have it
fixed so it will be ready to warn if
there is a problem.
If the light comes on while driving,
safely stop as soon as it is possible
and turn off the vehicle. Then turn on
the vehicle again to reset the system.
If the ABS warning light stays on,
or comes on again while driving, the
vehicle needs service. A chime may
also sound when the light stays on. If the ABS warning light is the only
light on, the vehicle has regular
brakes, but ABS is not functioning.
If both the ABS warning light and the
brake system warning light are on,
ABS is not functioning and there is a
problem with the regular brakes. See
your dealer for service.
See
Brake System Warning Light 0107.
Gear Shifting Light
If equipped, this light comes on when
a gear shift is recommended for best
fuel economy. When the arrow is
pointed up, an upshift is
recommended. When the arrow is
pointed down, a downshift is
recommended. The number displayed
with the arrow indicates the
recommended gear.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
110 INSTRUMENTS AND CONTROLS
Pedestrian Ahead Indicator
If equipped, this indicator will display
amber when a nearby pedestrian is
detected in front of the vehicle.
SeeFront Pedestrian Braking (FPB)
System 0261.
Traction Off Light
This light comes on briefly while
starting the engine. If it does not,
have the vehicle serviced by your
dealer. If the system is working
normally, the indicator light then
turns off. The traction off light comes on when
the Traction Control System (TCS) has
been turned off by pressing and
releasing the TCS/StabiliTrak/
Electronic Stability Control (ESC)
button.
This light and the StabiliTrak OFF
light come on when StabiliTrak/ESC is
turned off.
If the TCS is off, wheel speed will be
limited when necessary to protect the
driveline from damage. Adjust driving
accordingly.
See
Traction Control/Electronic Stability
Control 0235.
StabiliTrak OFF Light
This light comes on briefly while
starting the engine. If it does not,
have the vehicle serviced by your
dealer. This light comes on when the
StabiliTrak/Electronic Stability Control
(ESC) system is turned off.
If StabiliTrak/ESC is off, the Traction
Control System (TCS) is also off.
If StabiliTrak/ESC and TCS are off, the
system does not assist in controlling
the vehicle. Turn on the TCS and the
StabiliTrak/ESC systems, and the
warning light turns off.
See
Traction Control/Electronic Stability
Control 0235.
Traction Control System
(TCS)/StabiliTrak Light
This light comes on briefly when the
engine is started.
If the light does not come on, have
the vehicle serviced by your dealer.
If the system is working normally, the
indicator light turns off.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
INSTRUMENTS AND CONTROLS 111
If the light is on and not flashing, the
TCS and potentially the StabiliTrak/
ESC system have been disabled.
A Driver Information Center (DIC)
message may display. Check the DIC
messages to determine which
feature(s) is no longer functioning and
whether the vehicle requires service.
If the light is on and flashing, the TCS
and/or the StabiliTrak/ESC system is
actively working.
SeeTraction Control/Electronic Stability
Control 0235.
Engine Coolant
Temperature Warning Light
(Uplevel)
This light comes on briefly while
starting the vehicle. If it does not, have the vehicle
serviced by your dealer. If the system
is working normally the indicator light
goes off.
Caution
The engine coolant temperature
warning light indicates that the
vehicle has overheated. Driving with
this light on can damage the engine
and it may not be covered by the
vehicle warranty. See
Engine
Overheating 0294.
The engine coolant temperature
warning light comes on when the
engine has overheated.
If this happens, pull over and turn off
the engine as soon as possible. See
Engine Overheating 0294.
Driver Mode Control Light
This light comes on when Sport Mode
is selected.
This light comes on when Snow/Ice
Mode is selected.
This light comes on when Off-Road
Mode is selected.
See Driver Mode Control 0236.
Tire Pressure Light

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
112 INSTRUMENTS AND CONTROLS
For vehicles with the Tire Pressure
Monitor System (TPMS), this light
comes on briefly when the engine is
started. It provides information about
tire pressures and the TPMS.
When the Light Is On Steady
This indicates that one or more of the
tires are significantly underinflated.
A Driver Information Center (DIC) tire
pressure message may also display.
Stop as soon as possible, and inflate
the tires to the pressure value shown
on the Tire and Loading Information
label. SeeTire Pressure 0316.
When the Light Flashes First and
Then Is On Steady
If the light flashes for about a minute
and then stays on, there may be a
problem with the TPMS. If the
problem is not corrected, the light will
come on at every ignition cycle. See
Tire Pressure Monitor Operation 0319.Engine Oil Pressure Light
Caution
Lack of proper engine oil
maintenance can damage the
engine. Driving with the engine oil
low can also damage the engine.
The repairs would not be covered
by the vehicle warranty. Check the
oil level as soon as possible. Add oil
if required, but if the oil level is
within the operating range and the
oil pressure is still low, have the
vehicle serviced. Always follow the
maintenance schedule for changing
engine oil.
This light should come on briefly as
the engine is started. If it does not
come on, have the vehicle serviced by
your dealer. If the light comes on and stays on, it
means that oil is not flowing through
the engine properly. The vehicle could
be low on oil and might have some
other system problem. See your dealer.
Low Fuel Warning Light
This light is near the fuel gauge and
comes on briefly when the ignition is
turned on as a check to show it is
working.
It also comes on when the fuel tank is
low on fuel. The light turns off when
fuel is added. If it does not, have the
vehicle serviced.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
INSTRUMENTS AND CONTROLS 113
Security Light
The security light should come on
briefly as the engine is started. If it
does not come on, have the vehicle
serviced by your dealer. If the system
is working normally, the indicator
light turns off.
If the light stays on and the engine
does not start, there could be a
problem with the theft-deterrent
system. SeeImmobilizer Operation
0 27.
High-Beam On Light
This light comes on when the
high-beam headlamps are in use. See
Headlamp High/Low-Beam Changer
0131.
IntelliBeam Light
This light comes on when the
IntelliBeam system, if equipped, is
enabled. See Exterior Lamp Controls
0 129.
Lamps On Reminder
This light comes on when the exterior
lamps are in use, except when only
the Daytime Running Lamps (DRL)
are active. See Exterior Lamp Controls
0 129.
Cruise Control Light
The cruise control light is white when
the cruise control is on and ready, and
turns green when the cruise control is
set and active. See Cruise Control
0 237.
Adaptive Cruise Control Light
This light comes on when Adaptive
Cruise Control (if equipped) is active.
See Adaptive Cruise Control (Advanced)
0 240.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
120 INSTRUMENTS AND CONTROLS
the thumbwheel. The messages that
require immediate action cannot be
cleared until that action is performed.
All messages should be taken
seriously; clearing the message does
not correct the problem.
If a SERVICE message appears, see
your dealer.
Follow the instructions given in the
messages. The system displays
messages regarding the following
topics:
.Service Messages
.Fluid Levels
.Vehicle Security
.Brakes
.Steering
.Ride Control Systems
.Driver Assistance Systems
.Cruise Control
.Lighting and Bulb Replacement
.Wiper/Washer Systems
.Doors and Windows
.Seat Belts
.Airbag Systems
.Engine and Transmission
.Tire Pressure
.Battery
Engine Power Messages
ENGINE POWER IS REDUCED
This message displays when the
vehicle's propulsion power is reduced.
A reduction in propulsion power can
affect the vehicle's ability to
accelerate. If this message is on, but
there is no observed reduction in
performance, proceed to your
destination. Under certain conditions
the performance may be reduced the
next time the vehicle is driven. The
vehicle may be driven while this
message is on, but maximum
acceleration and speed may be
reduced. Anytime this message stays
on, or displays repeatedly, the vehicle
should be taken to your dealer for
service as soon as possible.
Under certain operating conditions,
propulsion will be disabled. Try
restarting after the ignition has been
off for 30 seconds.
Vehicle Speed Messages
SPEED LIMITED TO XXX
KM/H (MPH)
This message shows that the vehicle
speed has been limited to the speed
displayed. The limited speed is a
protection for various propulsion and
vehicle systems, such as lubrication,
thermal, brakes, suspension, Teen
Driver if equipped, or tires.
Vehicle Personalization
The following are all possible vehicle
personalization features. Depending
on the vehicle, some may not be
available.
For System, Apps, and Personal
features and functions, seeSettings
0 177.
To access the vehicle
personalization menu: 1. Touch the Settings icon on the Home Page of the infotainment
display.
2. Touch Vehicle to display a list of available options.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14584367) - 2021 - CRC - 10/14/20
136 INFOTAINMENT SYSTEM
Infotainment System
Introduction
Introduction . . . . . . . . . . . . . . . . . . . . . . 136
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Steering Wheel Controls . . . . . . . . . 138
Using the System . . . . . . . . . . . . . . . . . 139
Software Updates . . . . . . . . . . . . . . . . . 142
Radio
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . 142
HD Radio Technology . . . . . . . . . . . . 144
Radio Data System (RDS) . . . . . . . . 145
Satellite Radio . . . . . . . . . . . . . . . . . . . . 145
Radio Reception . . . . . . . . . . . . . . . . . . 146
Multi-Band Antenna . . . . . . . . . . . . . 146
Audio Players
Avoiding Untrusted MediaDevices . . . . . . . . . . . . . . . . . . . . . . . . . . 147
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Bluetooth Audio . . . . . . . . . . . . . . . . . . 150
OnStar System
OnStar System . . . . . . . . . . . . . . . . . . . . 150
Navigation
Using the Navigation System . . . . 151
Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Navigation Symbols . . . . . . . . . . . . . . 155
Destination . . . . . . . . . . . . . . . . . . . . . . . 156 OnStar System . . . . . . . . . . . . . . . . . . . . 162
Global Positioning
System (GPS) . . . . . . . . . . . . . . . . . . . 163
Vehicle Positioning . . . . . . . . . . . . . . . 163
Problems with Route Guidance . . . . . . . . . . . . . . . . . . . . . . . . 163
If the System Needs Service . . . . . 164
Map Data Updates . . . . . . . . . . . . . . . 164
Database Coverage Explanations . . . . . . . . . . . . . . . . . . . . 164
Voice Recognition
Voice Recognition . . . . . . . . . . . . . . . . 164
Phone
Bluetooth (Overview) . . . . . . . . . . . . . 170
Bluetooth (Pairing and Using aPhone) . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Apple CarPlay and Android Auto . . . . . . . . . . . . . . . . . . . 175
Settings
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Teen Driver . . . . . . . . . . . . . . . . . . . . . . . 184
Trademarks and License
Agreements
Trademarks and LicenseAgreements . . . . . . . . . . . . . . . . . . . . . 187
Introduction
Read the following pages to become
familiar with the features.
{Warning
Taking your eyes off the road for
too long or too often while using
any infotainment feature can cause
a crash. You or others could be
injured or killed. Do not give
extended attention to infotainment
tasks while driving. Limit your
glances at the vehicle displays and
focus your attention on driving. Use
voice commands whenever possible.
The infotainment system has built-in
features intended to help avoid
distraction by disabling some features
when driving. These features may gray
out when they are unavailable. Many
infotainment features are also
available through the instrument
cluster and steering wheel controls.
Before driving:
.Become familiar with the operation,
center stack controls, steering wheel
controls, and infotainment display.